英文關鍵字
adult
agriculture
arm
auto
car
cleaning
cornfield
country
development
dirt
dirty
earth
ecology
employment
engine
environmental
farmer
filthy
finger
garage
gardening
growing
hand
hard
hygiene
industry
job
laborer
maintain
maintenance
male
man
mechanic
motor
person
plantation
profession
repair
repairman
safety
service
show
technique
unhygienic
wash
work
worker
working
workshop